Key-lock.



c. ROBINSON.

KEY LOOK. APPLICATION FILED JUNE30,1913.

Patented Sept. 8, 1914 7 Fig.5

s wnnssss d? Zngvlsmorz ATTORNEY THE NORRI; PETERS CO.. FHOm-LITHQ, WASHINGTON. D. c.

UNITED STATES PATENT orrucn.

CLARK ROBINSON, OF HILLYABD, WASHINGTON.

To all whom it may concern: 1 Be itknown that I, CLARK ROBINSON, a citizen of the United States of America, residing at Hillyard, in the county of Spokane and Stateof Washington, have invented certain new and useful Improvements in Key-Locks, of which the following is a specification.

This invention pertains to key-locks and has for its object to lock the key in the doorlock after the door has been locked, so that the lock can not be picked from the opposite side of the door. The lock may also be used to lock the key in a position transverse to the opening in the lock to prevent the key from jarring out of the look when the door is unlocked and being opened and closed.

The invention consists of a device for engaging the key and being anchored in the key-hole of the lock.

A detail description of the device will be hereinafter given and illustrated in the accompanying drawings, in which- Figure 1, is an elevation of the device complete detached from the lock and from the key, Fig. 2, is a side View of a lock with the wall cut-away, showing an inner end view of the key and of the key-lock in position in the lock after the bolt of the lock has been thrown, the door locked and the key locked in position by the key-lock, Fig. 3, is a broken-away vertical sectional view of Fig. 2, Fig. 4, is a top view of the key and key-lock detached from the door-lock, and

-Fig. 5 is a broken-away side elevation of one form of thetop portion of the look.

I have shown a door-lock 10 of ordinary construction having a bolt 11 horizontally arranged within the lock 10 and adapted for being thrown horizontally outward beyond the wall 12 of the lock 10 as shown in Fig. 2, to engage a latch for locking purposes, the

lock being secured to a door and the latch to a door frame adjacent thereto. The bolt 11 is adapted for being thrown horizontally outwardly beyond the wall 12 of the lock 10 by means of a key inserted into the opening 13 and being returned by the same means. Inasmuch as the ordinary door-lock is provided with the opening 13 extending entirely through the lock 10 in order that a key may be inserted from either side to operate the bolt 11, the lock 10 is in danger of being picked or opened by mechanical means by persons other than those possessing the keys to the lock. The means herein pro- Specification of Letters lPatent. Application filed June 30, 1913. Serial No. 776,561. I p

KEY-LOCK.

Patented'Sept'. s,

vided lock the key. in the "door-lock in such a'manner that one onthe opposite side of the door cannot turn the key in the lock or shove the same out or extract the same therefrom. After the key .14has been inserted in the key-hole .1301? the lock 10 and the key14, I

turned so that the engagement of the lug 15 on the key 14 with the notch 16 of the bolt I 11 has thrown the bolt 11 outward with the end 11 extending beyond the wall 12 of the bolt, the key 14 is in the position shown in Figs. 2, 3 and 4. The locking device 17 consists of the vertically arranged portion 17 adapted for engagement in the key-hole 13 of the lock 10 directly beneath the body of the key 14 and extending into the lock 10 a sufficient distance to extend underneath that portion of the key 14 from which the lug 15 projects, and a horizontally arranged V shaped portion 17 adapted for engaging the upper and under surfaces of the keyportion 14*. Openings 17 extend through both walls of the V shaped portion 17 through which a key 18 is passed the same being also passed through the opening 14 of the key 14 whereby the keylock 17 is secured to the key 14 in such a manner that the same will not jar from its position in the lock 10 and on the key 14 as shown in Figs. 3 and 4 respectively.

The vertical width of the portion 17- of the key-lock 17 is such that the same can not be turned in the key hole 13. The portion 17 being held in a vertical position insures the V shaped portion 17 being held in a horizontal position and the engagement of the key-body 14 between the walls 17 and 17 of the V shaped portion 17 (Fig. 3) holds the key 14 firmly in the position in the lock 10 shown in Figs. 2 and 3 so that the same can not be turned from the opposite side of the lock and the position of the bolt 11 changed to unlock the door. The extension of the portion 17 into the key-hole 13 to a position underneath the lug 15 of the key 14 also serves as an obstruction to the turning of the key 14 by being in the path of the lug 15.

In the same manner as above described the key 14 may be locked into the lock 10 when the door is open or unlocked, to prevent the same from jarring out of the lock. The V shaped portion 17 b is provided with a number of openings 17 in order to adjust the lock to different length keys 14.

In Fig. 5 I have shown a modified form of the portion 17 of the key-lock, the. defiected portion 19 being for the purpose of serving as an obstruction to any instrument that might be inserted through the key-hole opening 13 from the opposite side of the door in an effort to remove the key or pin 18.

What I claim is,

A key-lock comprising a U shaped member for engagement with the key portion outside of the lock and a portion connected therewith extending horizontally from the end of one wing of said U shaped member for engagement in the key-hole of the lock adjacent to the key, a pin passing through said U shaped member and engaging the key portion therein, together with an outward deflection of the end of the other wing of the U shaped member between the in and the portion extending horizontally rom the end of the other wing of the U shaped memher, said deflection consisting of a portion at approximately right angles with said wing adapted for guarding said pin against being removed by an instrument inserted through the key-hole of the look from the opposite side of said look.

In testimony whereof I aifix my signature in presence of two witnesses.

CLARK ROBINSON.

Witnesses:

WILLIAM H. KAYE, CI ARLEs L. KIK.

Copies of thispatent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

